package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.sl.usermodel.Sheet;
import org.apache.poi.util.StringUtil;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;

    /*
     * 指定时间营业额统计
     * */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end范围内每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        LocalDate localDate = begin;
        while (!localDate.equals(end)) {
            dateList.add(localDate);
            localDate = localDate.plusDays(1);
        }
        dateList.add(end);
        String dateStr = StringUtils.join(dateList, ",");
        //统计时间范围内的营业额数据
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询date对应日期的营业额
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("beginTime", beginTime);
            map.put("endTime", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }
        String turnoverStr = StringUtils.join(turnoverList, ",");
        //封装返回结果
        return TurnoverReportVO.builder()
                .dateList(dateStr)
                .turnoverList(turnoverStr).build();
    }

    /*
     * 统计用户
     * */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //总用户总量
        List<Integer> totalUserList = new ArrayList<>();
        //新增用户数量
        List<Integer> newUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("endTime", endTime);
            Integer totalUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            map.put("beginTime", beginTime);
            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser);
        }
        String dateStr = StringUtils.join(dateList, ",");
        String totalUserStr = StringUtils.join(totalUserList, ",");
        String newUserStr = StringUtils.join(newUserList, ",");
        return UserReportVO.builder()
                .newUserList(newUserStr)
                .totalUserList(totalUserStr)
                .dateList(dateStr).build();
    }

    /*
     * 订单统计统计
     * */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        //存放从begin到end的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //每天订单总数
        List<Integer> totalOrderList = new ArrayList<>();

        //每天有效订单数量
        List<Integer> validOrderList = new ArrayList<>();
        //查询每天订单总数和有效订单数
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("endTime", endTime);
            map.put("beginTime", beginTime);
            //查询每天订单总数
            Integer totalOrder = orderMapper.countByMap(map);
            totalOrderList.add(totalOrder);
            //查询每天有效订单
            map.put("status", Orders.COMPLETED);
            Integer validOrder = orderMapper.countByMap(map);
            validOrderList.add(validOrder);
        }

        //计算时间区间内的订单总数
        Integer totalOrderCount = totalOrderList.stream().reduce(Integer::sum).get();
        //计算时间区间内的有点订单总数
        Integer validOrderCount = validOrderList.stream().reduce(Integer::sum).get();
        //计算有效订单率

        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(totalOrderList, ","))
                .validOrderCountList(StringUtils.join(validOrderList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /*
     * Top10统计
     * */
    @Override
    public SalesTop10ReportVO getTop10(LocalDate begin, LocalDate end) {
        //获取当前时间段
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        //获取top10商品数据
        List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSalesTop10(beginTime, endTime);
        List<String> nameList = goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numberList = goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String nameStr = StringUtils.join(nameList, ",");
        String numberStr = StringUtils.join(numberList, ",");
        return SalesTop10ReportVO.builder()
                .nameList(nameStr)
                .numberList(numberStr)
                .build();
    }

    /*
     * 导出运营数据报表
     * */
    @Override
    public void exportBusinessDate(HttpServletResponse response) {
        //查询数据库，获取营业数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);
        LocalDateTime beginTime = LocalDateTime.of(dateBegin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(dateEnd, LocalTime.MAX);
        //查询概览数据
        BusinessDataVO businessData = workspaceService.getBusinessData(beginTime, endTime);
        //通过poi将数据写入到excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        //基于模板文件创建一个新的excel文件
        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);
            //填充数据--时间
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);
            //填充数据--概览数据
            sheet.getRow(3).getCell(2).setCellValue(businessData.getTurnover());
            sheet.getRow(3).getCell(4).setCellValue(businessData.getOrderCompletionRate());
            sheet.getRow(3).getCell(6).setCellValue(businessData.getNewUsers());
            sheet.getRow(4).getCell(2).setCellValue(businessData.getValidOrderCount());
            sheet.getRow(4).getCell(4).setCellValue(businessData.getUnitPrice());
            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData1 = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                XSSFRow row = sheet.getRow(7 + i);

                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData1.getTurnover());
                row.getCell(3).setCellValue(businessData1.getValidOrderCount());
                row.getCell(4).setCellValue(businessData1.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData1.getUnitPrice());
                row.getCell(6).setCellValue(businessData1.getNewUsers());


            }
            //通过输出流将excel文件下载到客户端浏览器
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);
            //关闭资源
            outputStream.close();
            excel.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }
}
